CHAPTER 13
Configuring Layer 2 Protocol Tunneling
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Layer 2 Protocol Tunneling on ACX Series Overview on page 437
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Enabling Layer 2 Protocol Tunneling on ACX Series on page 439
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Configuring a Layer 2 Protocol Tunnel Interface in ACX Series on page 439
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Configuring a Layer 2 Protocol to be Tunneled in ACX Series on page 440
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Configuring Layer 2 Protocol Tunneling on ACX Series on page 441
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Checking for a MAC Rewrite Error Condition Blocking Layer 2 Interface in ACX
Series on page 442
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Clearing a MAC Rewrite Error Condition Blocking a Spanning-Tree Instance Interface
in ACX Series on page 442
Layer 2 Protocol Tunneling on ACX Series Overview
Layer 2 protocol tunneling (L2PT) allows Layer 2 protocol data units (PDUs) to be
tunneled through a network.
L2PT on ACX Series routers supports tunneling the following Layer 2 PDUs:
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Spanning Tree Protocol (STP), Rapid Spanning Tree Protocol (RSTP), and Multiple
Spanning Tree Protocol (MSTP)
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Cisco Discovery Protocol (CDP)
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VLAN Trunk Protocol (VTP)
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IEEE 802.1X authentication
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IEEE 802.3ah Operation, Administration, and Maintenance (OAM) link fault
management (LFM)
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Ethernet local management interface (E-LMI)
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Link Aggregation Control Protocol (LACP)
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Link Layer Discovery Protocol (LLDP)
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Multiple MAC Registration Protocol (MMRP)
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Multiple VLAN Registration Protocol (MVRP)
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